Wrench.



C. McLAY.

WRENCH.

APPLICATION FlLED JANA, 191s.

1,205,9'1 1. Patented Nov. 21, 1916.

w I I v I fZq CHARLES MoLAY. OE MELVILLE, SASKATCHEWAN, CANADA.

WRENCH.

Specification of Letters Patent.

Patented Nov. 21, 1916.

Application filed January 4, 1916. Serial No. 70,099.

of which the following is a specification.

The present invention relates to improve- I ments in the construction ofwrenches.

In carrying out my invention it is my purpose to construct a wrenchincluding a stationary and a movable jaw, and commonly known as a monkeywrench, with simple, cheap and effective means for looking the movablejaw upon the shank of the stationary jaw.

With the above and other objects in view, the improvement resides in theconstruction, combination and arrangement of parts set forth in thefollowing specification and falling within the scope of the appendedclaim.

In the drawing: Figure 1 is a view of a wrench constructed in accordancewith the present invention, the carriage of the mov-.

able jaw being shown in section to illustrate the locking elementsarranged thereon, Fig. 2 is a sectional view approximately on the line2-2 of Fig. 1, Fig. 3 is a perspective view of a spring, Fig. 4 is. asimilar view of the actuating thereon, Fig. 5 is a similar view of amember which may be em loyed for bridging the yoke members of t eremovable jaw or for partially closing the channel in the shank orcarriage of the movable jaw.

Referring now to the drawings in detail, the numeral 1 designates astationary jaw that is provided with the usual shank 2 that has one ofits edges provided with transverse teeth 3, and the numeral 4 designatesthe handle for the shank. The movable jaw is indicated by the numeral 5and includes a shank or carriage 6 as well as yokes 7-7 which straddlethe shank 2 of the stationary jaw. The carriage 6, in the presentinstance is provided with an elongated slot 8 which may communicate withthe yokes 7 and the top of the slot 8 may be partially closed by alongitudinally extending strip 9 that is connected thereto in anydesired or preferred manner. The strip 9 has one of its edges formedwith a curved depression 10 and its opposite edge at a suitable distanceaway from the depression provided with a notch 1.- Thi 9W}; 11 is adpted to elever and the pawl arranged ceive one of the offset ends 12provided upon one of the angular arms 13 of a spring 14:. The springincludes a coil or body portion 15 which rests within the depression 10of the member 9. The coils or convolutions 15 of the spring also serveas a fulcrum point to receive an arcuate member 16 provided in a lever17 that is arranged in the slot 8 and which has its tail portionprojecting through the slot. This lever 17 has the edge opposite thatfulcrumed upon the spring 1 1 provided with a notch 18 disposedsubstantially diametrically opposite the notch 11 of the member 9 andthe said notch is adapted to receive the second and offset end 19 of thesecond angular arm 20 of the spring 14.

The numeral 21 designates a toothed dog that is pivotally secured to thelever 17 and which isadapted to be arranged at the end wall provided bythe slot 8 and the inner end of the member 9 and thereby projected tocontact between the teeth 3 of the shank 2.

Having thus described the invention, what I I claim is:

The wrenches including, in combination, a stationary jaw having atoothed shank, a slidable jaw on the shank, said slidable jaw having alongitudinal slot communicating with the toothed edge of the shank, astrip arranged longitudinally in the slot and having its end terminatingaway from the inner Wall of said slot and secured to the sidewalls ofthe said slot, said strip adjacent its inner end having its edge next tothe shank provided with a transverse notch and its other edge formedwith a round depression which is spaced from the said notch, a leverloosely arranged in the slot and projecting therethrough, said leveradjacent its inner end having one of its edges notched and its otheredge provided with a transverse rounded depression which is adapted tobe disposed to aline with the rounded depression in the strip, a pivoteddog upon the inner end of the lever and adapted toplay between the endwall of the slot and the inn r a d r a st ip a d n w s th the hereindescribed construction of teeth of the shank, a spring having 5coiledportion disposed to be received in the alining rounded depressionsin the lever and in the strip, the arms extending from the coil of thespring having their ends bent whereby one of said ends will be receivedin the notch in the strip and thecther end received 1n the notch in thelever to swing the lever to normally force the dog into engagement withthe teeth of the shank.

In testimony whereof I afiix my signature in presence of two Witnesses.CHARLES McLAY.

Witnesses:

O. W. BRUNSELL, PAwLo GLQWA.

